While a undergrad at Stanford, I undertook a project to create a version of Conway’s Game of Life where you can edit the rules in real-time. You can find it here, as well as in the below embed (which is cool but too small to really have fun with!)

This tool allows researchers and hobbyists to more quickly explore rulesets to find ones with interesting properties, and below I’ve shared screenshots of some of the thousands of interesting patterns that have been found.